... through drawing, annealing, chlorhydric acid washing, water washing, electro zinc coating, water washing, passivate bright treatment, drying and ... acid washing, water washing, hot dipped zinc coating, drying and other procedures, our product can achieve in ASTM641 standard.3 ... , water washing, hot dipped zinc coating, drying and other procedures, our product can achieve in ASTM641 standard.We can pack ...